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Gecko Physics

12/18/2018

 
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Hebrews 3:4
“For every house is builded by some man; but he that built all things is God..”
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   For 75 years, scientists have been trying to figure out how the gecko can walk across a ceiling. Scientists ruled out suction or glue. Then it was thought that perhaps the tiny hairs on its feet were able to grasp microscopic imperfections in the surface in which it walks. However, the gecko can not only walk across a polished glass ceiling, it can even hang by just one toe.
   Geckos have tiny hairs on their feet called setae. From these tiny hairs grow even tinier hairs called spatulae. These spatulae are so tiny that there are about a billion of them on each foot. Researchers have found that these tiniest hairs are so small that they contact the molecules of a surface so closely that they actually use the very forces that hold the molecules together! Scientists have tested the strength of these forces, called van der Waals forces, for the first time. They found that these forces are much more powerful than first thought. As the gecko walks across a surface, it unrolls its toes, bringing the spatulae into contact with the surface. Then it gives a tiny tug that aligns the spatulae parallel to the surface, increasing their hold by ten times. As the gecko lifts its foot for the next step, it levers the spatulae off the surface, breaking the bond. Based on this research on the gecko’s trick, scientists are working to develop glues based on the same principle.
   While geckos and chance evolution know nothing about van der Waals bonds, the Creator Who made them both has left His signature in this unique and elegant design.

creationmoments.com/sermons/gecko-physics-3/


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